Question

A spacecraft is in a circular orbit around the earth. It then
moves into a second, different circular orbit in which the
spacecraft moves more slowly than in the first.

Compared with the first orbit, the second orbit has

a) a larger radius and less total mechanical energy
b) a smaller radius and less total mechanical energy
c) a smaller radius and the same total mechanical energy
d) a larger radius and the same total mechanical energy
e) a smaller radius and greater total mechanical energy
f) a larger radius and greater total mechanical energy